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Measurement of the Ξ[superscript −][subscript b] and Ω[superscript −][subscript b] Baryon Lifetimes

Author(s)
Counts, Ian Thomas Hunt; Ilten, Philip J; Williams, Michael
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Abstract
Using a data sample of pp collisions corresponding to an integrated luminosity of 3 fb[supercript -1], the Ξ[superscript -][subscript b] and Ω[supercript -][subscript b] baryons are reconstructed in the Ξ[superscript -][subscript b] → J/ψΞ[superscript -] and Ω[superscript -][subscript b] → J/ψΩ[superscript -] decay modes and their lifetimes measured to be τ(Ξ[superscript -][subscript b]) = 1.55[subscript -0.09][superscript +0.10](stat)±0.03(syst)ps, τ(Ω[superscript -][subscript b]) = 1.54[subscript -0.21][subscript +0.26](stat)±0.05(syst)ps. These are the most precise determinations to date. Both measurements are in good agreement with previous experimental results and with theoretical predictions. © 2014 The Authors
Date issued
2014-06
URI
http://hdl.handle.net/1721.1/116480
Department
Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear Science
Journal
Physics Letters B
Publisher
Elsevier BV
Citation
Aaij, R., et al. “Measurement of the Ξ[superscript −][subscript b] and Ω[superscript −][subscript b] Baryon Lifetimes.” Physics Letters B, vol. 736, Sept. 2014, pp. 154–62. © 2014 The Authors
Version: Final published version
ISSN
0370-2693

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